[A] Win XP 2012 Virus completely Disabled all means to remove it

I am trying to remove the Win XP 2012 virus. It has disabled the mouse, startup options, installing any applications, cannot reinstall windows, UBCD will not work, and the antivirus antispyware software on the computer has been modified to not recognize the malware. Any suggestions? Task manager and regedit do not work either. All files and folders on the computer have been hidden. I found the program and deleted it then that is when the mouse quit working.